No not all lower playfield
Is it the same amount of G.I out before you sent be the board or less?
If it's only 1 string out then it won't be the transistor for the G.I relay.
Try un pluging the connector I mentioned before
Same as before. As mentioned above. When I unplug J12 from ICB all lights come on
it was J12 on cpu / driver board but solenoid 10 (G.I. lower PF relay) goes through J12 on ICB so unfortunately you have blown the transistor